When I installed Kali Linux lately on Hyper-V I realized that the resolution of the RDP session (opened within Hyper-V Manager) was stuck to 1024×768. I was not able to make any – obvious – change somewhere. And to be honest: 1024×768 was just not enough for me.
After some googling I found a working solution for me here . Going to condense that content as follows:
Change the resolution
We have to make a modification to a config for grub and restart the machine.
Therefore go to your Kali Linux machine and open a terminal.
# Open the grub config file john@kali:~$ sudo nano /etc/default/grub
Search for a line similar to this
Possible that there are more parameters after “quiet”. But this is the line we need to modify.
So change this line to the following:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=hyperv_fb:1920x1080"
Info | In my case I switched the resolution to 1920×1080. I havn’t tested any higher resolutions. So, can’t tell if it’s working with higher numbers.
Let me know if you have any experiences with that.
Save the modifcation with nano’s shortcuts Ctrl+X and confirm with y.
Now update the change for grub with this statement
john@kali:~$ sudo update-grub
After a restart of your Kali Linux machine the new settings should apply and you’ll now have way more place on your desktop.
 Change Kali Linux screen resolution on hyper-V Virtual Machine (Youtube: HERESJAKEN)